CN104385546B - PP and TPU composite double-layer hollow plastic plate coextrusion manufacture technology - Google Patents
PP and TPU composite double-layer hollow plastic plate coextrusion manufacture technology Download PDFInfo
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- CN104385546B CN104385546B CN201410613490.2A CN201410613490A CN104385546B CN 104385546 B CN104385546 B CN 104385546B CN 201410613490 A CN201410613490 A CN 201410613490A CN 104385546 B CN104385546 B CN 104385546B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2022/00—Hollow articles
Abstract
The invention discloses a PP and TPU composite double-layer hollow plastic plate coextrusion manufacture technology. The PP and TPU composite double-layer hollow plastic plate coextrusion manufacture technology comprises the following steps: preparing raw materials, fusing and plasticizing, distributing fused materials, putting the fused materials into a mold, dragging, tempering, carrying out air cooling and cutting. According to a PP and TPU composite double-layer hollow plastic plate produced by a method disclosed by the invention, an appearance elastomer has a micro foggy surface, the appearance is flat, the weight is light, the damp-proof, non-toxic, impact resistant and anti-slip effects are achieved, the environmental-friendliness requirement can be met, and the PP and TPU composite double-layer plastic plate is good in impact intensity, and is applied to the aspects of conductive or anti-electrostatic pass boxes, smoke box recycling boxes and the like.
Description
Technical field
The present invention relates to a kind of plastic sheet manufacture craft, and in particular to a kind of PP and TPU composite double layer hollow synthetic resin plates
The manufacture craft of material co-extrusion.
Background technology
TPU is TPUE rubber, and it has oil resistant, the characteristic of water-fast, wear-resisting, resistance to mould, because its
High mechanical strength, the bearing capacity of product, impact resistance and damping performance are projected, and its cold resistance is good, at -50 DEG C still
Good elasticity, compliance and other physical properties can be kept；And the good processability of TPU, it adopts thermoplastic
Processing method extruded, the polymer alloy for obtaining performance complement can be jointly processed with polypropylene.
All there are some defects in the casing that in the market common polypropylene multi-layer plastic sheet co-extrusion makes：Such as resistance to punching
Hitting property is not strong, and resistance to low temperature is poor, and surface is smooth, is difficult to folded, for the PP multi-layer plastic rubber sheet materials of wide distracted muscle, although in application
Aspect is easily folded, but overall sheet material impact strength is smaller when the sheet material of low thickness and low grammes per square metre is made, and conventional
The physical property of product (regular size) of the distracted muscle of rectangle is as follows：
Hollow plate thickness is 4mm, and base weight is 780g/m2, its pull-off force is about 27.3kgf, and elongation at break is about 58%
More than, flat compressed power is about 323.87kgf/100cm2, and vertical compression force is about 80.35kgf, and tear edge is about 42.3kgf.
Accordingly, it is now desired to a kind of make PP with the method and sheet material of TPU composite double layer hollow plastic sheet materials to solve
The defect of PP multi-layer plastic rubber sheet materials common in the art.
The content of the invention
To solve above-mentioned technical problem, the day of the present invention is to provide PP and the TPU that a kind of technological parameter is relatively easy to control
The manufacture craft of composite double layer hollow plastic sheet material co-extrusion, by the technique the good composite double layer of impact strength can be prepared
Hollow plastic sheet material.
To reach above-mentioned purpose, technical scheme is as follows：
The manufacture craft of a kind of PP and TPU composite double layer hollow plastic sheet material co-extrusions, including the following steps：
It is prepared by the first step, raw material：By the PP particles that percentage by weight is 90% and the TPU particles that percentage by weight is 10%
It is ready to respectively, then PP particles and TPU particles is sucked into extruder by Material sucking machine；
Second step, fusion plastification：First it is the fusion plastification in main frame, the material in the first step enters extruder
In barrel, by Screw Extrusion Stress control in 60～80MPa, extruding machine barrel temperature control is adjusted in the range of 140～198 DEG C；
Followed by fusion plastification in subsidiary engine, material enters the barrel of extruder, by Screw Extrusion Stress control in 40～70MPa, extrusion
Machine barrel temperature control adjustable range is 180～230 DEG C；
3rd step, fused materials distribution：The fused materials of double extrusion barrel extrusions in the second step are entered into into melt
In pump, carry out fused materials in the Melt Pump and be allocated co-extrusion；
4th step, fused materials enter mould：The fused materials of Jing Melt Pumps distribution enter into mould in 3rd step
In, mold temperature is set to 9 sections, respectively：208～230 DEG C, 198～202 DEG C, 193～197 DEG C, 188～192 DEG C, 183～
187 DEG C, 188～192 DEG C, 193～197 DEG C, 198～202 DEG C and 208～230, fused materials are entered from after mould outlet extrusion
On shaping platform, high-temperature molten material is cooled and solidified on the shaping platform and form sheet material blank；
5th step, traction：The sheet material blank is entered between the rubber roll of hauling machine, sheet material blank traction is carried out；
6th step, tempering：By from the sheet material blank pulled out between the hauling machine rubber roll pass through tempering box, described time
Fire-box temperature is 80～120 DEG C；
7th step, it is air-cooled：Sheet material blank from the tempering box out is passed through into air-cooled；
8th step, cuts：To require to cut from described air-cooled sheet material stock out.
Preferably, in the second step, during the fusion plastification in main frame, extruding machine barrel temperature control is adjusted includes three
Section is adjusted：Fusion plastification section temperature is：140～180 DEG C, equalizer section temperature be 180～195 DEG C, metering section temperature be 190～
198℃；In subsidiary engine during fusion plastification, extruding machine barrel temperature control is adjusted includes three sections of regulations：Fusion plastification section temperature is：
180～195 DEG C, equalizer section temperature is 195～210 DEG C, and metering section temperature is 210～230 DEG C.
Preferably, in the 4th step, fused materials are entered on shaping platform from after mould outlet extrusion, the shaping platform
Table top temperature be 15～20 DEG C.
Preferably, in the 6th step, sheet material blank is 100～140s through the time used by tempering box.
Preferably, the extruder is two plastic extruder combinations, and it includes single screw rod main frame and single screw rod subsidiary engine, institute
It is 90/rpm to state single screw rod engine speed, and the single screw rod subsidiary engine rotating speed is 150/rpm.
Preferably, a kind of PP and TPU composite double layer hollow plastic sheet materials, its by the PP described in any of the above one with
The manufacture craft of TPU composite double layer hollow plastic sheet material co-extrusions is prepared from, upper strata TPU composite beds and lower floor's TPU composite beds, institute
It is polypropylene layer to state in the middle of upper strata TPU composite beds and lower floor TPU composite beds, sets spaced hollow in the middle of the polypropylene layer
Portion.
Preferably, the TPU composite bed thickness is 0.4mm, and the polypropylene layer thickness is 3.6mm.
The invention has the beneficial effects as follows：
The manufacture craft of one, PP the and TPU composite double layer hollow plastic sheet material co-extrusions of the present invention, technological process simply may be used
Lean on, technological parameter is relatively easy to control, be adapted to large-scale production composite double layer hollow plastic sheet material.
Two, by the composite double layer hollow plastic sheet material of the bright preparation of this technique, shape is smooth, light weight, protection against the tide, nothing
Malicious, pollution-free, impact resistance, low temperature resistant, anti-skidding characteristic and meet the speciality of environmental requirement.
Three, the impact strength of the reinforced structure of double layer hollow plastic sheet is good, and the density of distracted muscle causes insulation
Better performances, comparison is light, can be widely used in the aspects such as Turnover Box.
Description of the drawings
Technical scheme in order to be illustrated more clearly that embodiment of the present invention technology, below will be in the description of embodiment technology
The required accompanying drawing for using is briefly described, it should be apparent that, drawings in the following description are only some realities of the present invention
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is PP of the present invention and TPU composite double layer hollow plastic sheet material structural representations.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment 1
It is 600g/m that the present embodiment makes thickness for 3.5mm, base weight2PP and TPU composite double layer hollow plastic sheet materials, PP
Comprise the following steps with the manufacture craft of TPU composite double layer hollow plastic sheet materials：
The first step, preparing raw material：Material is sucked into extruder by the polypropylene PP particles input Material sucking machine of 90kg；By 10kg
Thermoplastic elastomer TPU particles input Material sucking machine material is sucked into extruder.
Second step, fusion plastification：
1st, main frame fusion plastification process：Material enter extruder barrel, Screw Extrusion Stress control in 60～75MPa,
Extruding machine barrel temperature control is adjusted and is divided into three sections, and at 140～150 DEG C, equalizer section temperature control exists its fusion plastification section temperature control
180～185 DEG C, metering section temperature control is at 190～193 DEG C.
2. subsidiary engine TPU materials fusion plastification in barrel：Material enters the barrel of extruder, and Screw Extrusion Stress control exists
40～60MPa, extruding machine barrel temperature control is adjusted and is divided into three sections, its fusion plastification section temperature control at 180～195 DEG C, equalizer section
, at 195～215 DEG C, metering section temperature control is at 215～230 DEG C for temperature control.
3rd step, fused materials distribution：The fused materials of extruding machine barrel extrusion are allocated into Melt Pump, co-extrusion.
Because the inventory of main frame extrusion is more than subsidiary engine, and the viscosity of polypropylene PP flows again smaller than TPU material melts
When can fill up in cavity body of mould, at this moment main frame extrusion capacity more than subsidiary engine more than 2 times of extrusion capacity, TPU melt-flow materials
Very thin one layer is squeezed into by polypropylene in cavity body of mould and is attached to cavity body of mould inner surface, it is very thin to form upper strata or lower floor
It is polypropylene in the middle of TPU elastomers.
As overall material extrudes flowing in mould, the complex material that now mould is flowed out then forms double-layer plastic
Hollow sheeting；On polypropylene plate face accumulating amount of the extrusion capacity of subsidiary engine to increase TPU elastomers can also be adjusted and control thickness；It is poly-
Propylene PP thickness 3.6mm, thickness deviation ± 2, elastomer thickness be 0.4mm, thickness deviation ± 2.
4th step, shaping：The fused materials of Jing Melt Pumps distribution enter mould, and mold temperature set is 9 sections, respectively：
208～230 DEG C, 198～202 DEG C, 193～197 DEG C, 188～192 DEG C, 183～187 DEG C, 188～192 DEG C, 193～197 DEG C,
198～202 DEG C and 208～230, fused materials enter the shaping platform that table top temperature is 15～16 DEG C from after mould outlet extrusion,
When extrusion melt material enters shaping platform in mould, high-temperature molten material cooling and solidifying on shaping platform is set to form sheet material base
Material.
5th step, traction：Sheet material blank after shaping between the rubber roll of hauling machine into being drawn.
6th step, tempering：Tempering box, tempering box temperature control are passed through from the sheet material blank pulled out between hauling machine rubber roll
At 80～90 DEG C, sheet material blank is 100～110sec through the time used by tempering box to system.
It is 7th step, air-cooled：Air-cooled is passed through from tempering box sheet material blank out.
8th step, cut：Required size is cut on request from air-cooled sheet material blank out.
Then thickness made by is 3.5mm, base weight is 600g/m2PP and TPU composite double layer hollow plastic sheet materials, it is then right
It carries out performance test, tests the performance parameter for obtaining as shown in table 1.
The performance parameter of the sheet material that 1 embodiment of table 1 is obtained
Embodiment 2
It is 780g/m that thickness is made in the present embodiment for 4mm, base weight2PP and TPU composite double layer hollow plastic sheet materials, PP
Comprise the following steps with the manufacture craft of TPU composite double layer hollow plastic sheet materials：
The first step, preparing raw material：Material is sucked into extruder by the polypropylene PP particles input Material sucking machine of 90kg；By 10kg
Thermoplastic elastomer TPU particles input Material sucking machine material is sucked into extruder.
Second step, fusion plastification：
1st, main frame fusion plastification process：Material enter extruder barrel, Screw Extrusion Stress control in 60～75MPa,
Extruding machine barrel temperature control is adjusted and is divided into three sections, and at 140～150 DEG C, equalizer section temperature control exists its fusion plastification section temperature control
180～185 DEG C, metering section temperature control is at 190～193 DEG C.
2. subsidiary engine TPU materials fusion plastification in barrel：Material enters the barrel of extruder, and Screw Extrusion Stress control exists
40～60MPa, extruding machine barrel temperature control is adjusted and is divided into three sections, its fusion plastification section temperature control at 180～195 DEG C, equalizer section
, at 195～215 DEG C, metering section temperature control is at 215～230 DEG C for temperature control.
3rd step, fused materials distribution：The fused materials of extruding machine barrel extrusion are allocated into Melt Pump, co-extrusion.
4th step, shaping：The fused materials of Jing Melt Pumps distribution enter mould, and mold temperature set is 9 sections, respectively：
208～230 DEG C, 198～202 DEG C, 193～197 DEG C, 188～192 DEG C, 183～187 DEG C, 188～192 DEG C, 193～197 DEG C,
198～202 DEG C and 208～230, fused materials enter the shaping platform that table top temperature is 15～16 DEG C from after mould outlet extrusion,
When extrusion melt material enters shaping platform in mould, high-temperature molten material cooling and solidifying on shaping platform is set to form sheet material base
Material.
5th step, traction：Sheet material blank after shaping between the rubber roll of hauling machine into being drawn.
6th step, tempering：Tempering box, tempering box temperature control are passed through from the sheet material blank pulled out between hauling machine rubber roll
At 80～90 DEG C, sheet material blank is 100～110sec through the time used by tempering box to system.
It is 7th step, air-cooled：Air-cooled is passed through from tempering box sheet material blank out.
8th step, cut：Required size is cut on request from air-cooled sheet material blank out.
Then thickness made by is 4mm, base weight is 780g/m2PP and TPU composite double layer hollow plastic sheet materials, then to it
Performance test is carried out, the performance parameter for obtaining is tested as shown in table 2.
The performance parameter of the sheet material that 2 embodiment of table 2 is obtained
Can be seen that what is produced by the inventive method by the performance parameter of the sheet material obtained in embodiment 1 and embodiment 2
PP and TPU composite double layer hollow plastic sheet materials, profile is smooth, light weight, protection against the tide, nontoxic, pollution-free, impact resistance, low temperature resistant, anti-skidding
Characteristic and meet the speciality of environmental requirement：The impact strength of the reinforced structure of multi-layer plastic pallet is good, and distracted muscle is close
Degree causes heat-insulating property preferable.
The PP that the manufacture craft of the present invention makes and institute in the basic structure such as Fig. 1 of TPU composite double layer hollow plastic sheet materials
Show, its main upper strata TPU composite bed 11 and lower floor TPU composite beds 12, above-mentioned upper strata TPU composite beds 11 and lower floor's TPU composite beds
It is polypropylene layer 20 in the middle of 12, spaced hollow bulb 30 is set in the middle of above-mentioned polypropylene layer.Outward appearance surface of elastomer is into slight mist
Shape, profile is smooth, the presence of hollow bulb 30 causes the lighter weight of sheet material, PP and TPU composites humidity resistance is good, nontoxic,
Pollution-free, impact resistance, it is anti-skidding, meet environmental requirement；The impact resistance of the reinforced structure of the composite double layer plastic plate of said structure is strong
Spend, be used in the fields such as conductive and antistatic logical case, smoke box Turnover Box.
In the present invention, TPU composite bed thickness is made into 0.4mm, it is optimal that polypropylene layer thickness makes 3.6mm.
In Example 1 and Example 2 of the present invention, extruder is two plastic extruder combinations, including including single screw rod
Main frame and single screw rod subsidiary engine, single screw rod main frame is 120 types, and rotating speed is 90/rpm；Single screw rod subsidiary engine is 45 types, and rotating speed is 150/
rpm。
The design parameter of above-mentioned main frame is：Mair motor is using Hangzhou gold boa Z4 081034 type direct current generators of series：It is applied to
Speed adjustable range is big, the Electric Traction that dynamic requirements are high；Gearbox is designed using high pulling torque high speed ouble bar link.Screw rod, barrel material
38CrMoAIA ￠ 120/35, surface nitride layer 45um；Cycloidal pin adopts Changzhou international trade reductor：XWD5-11-4 types, its transmission
Steadily；Electrically adopted by Shanghai Oudahaiwei Complete Automation Co., Ltd's (PLC power supply+CPU) main extruder and measuring pump control
Air conditioner cooling system is installed additional with 104 cun of color screens of SIEMENS PLC and the communication of RKC tables, all Electric Appliance Cabinets.
The technical parameter of subsidiary engine is：Screw diameter D：Φ45mm；Screw rod effective length：1130mm；Screw slenderness ratio：25∶
1；Fuselage heating power：9 kilowatts；Fuselage bringing-up section：3 sections；The type of cooling：Machine barrel DF-3 blower fans；Cooling：3 sections.
Mair motor is using Hangzhou gold boa Z4-100 type direct current generators：Suitable for the electric power that speed adjustable range is big, dynamic requirements are high
Drag；Gearbox is designed using high pulling torque high speed ouble bar link；Screw rod, barrel material 38CrMoAIA ￠ 120/35, surface nitride layer
45um；Cycloidal pin adopts Changzhou international trade reductor：XWD5-11-4 types, its stable drive；Electrically automated by Shanghai Ou Dahaiwei
Complete Co., Ltd's (PLC power supply+CPU) main extruder and measuring pump control are logical using 104 cun of color screens of SIEMENS PLC and RKC tables
News, all Electric Appliance Cabinets install air conditioner cooling system additional.
Mould is specially customized by mould enterprise.
Hydraulic lifting shaping platform：It is double to continue in succession；The surface polishing that wide 2500mm, long 1900mm deadweight 6T, product are passed through is thrown
Light sprays teflon；And have an injection hole many places suction air to control the surfacing of sheet material by upper and lower two-layer, while using water temperature control
The temperature of machine shaping platform processed.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (7)
1. a kind of manufacture craft of PP and TPU composite double layer hollow plastic sheet material co-extrusions, it is characterised in that the hollow board material bag
Upper strata TPU composite beds and lower floor's TPU composite beds are included, is poly- third in the middle of the upper strata TPU composite beds and the lower floor TPU composite beds
Alkene layer, sets spaced hollow bulb in the middle of the polypropylene layer, the manufacture craft includes the following steps：
It is prepared by the first step, raw material：By the PP particles that percentage by weight is 90% and the TPU particles that percentage by weight is 10% difference
It is ready to, then PP particles and TPU particles is sucked into extruder by Material sucking machine；
Second step, fusion plastification：First it is the fusion plastification in main frame, the material in the first step enters the barrel of extruder
In, by Screw Extrusion Stress control in 60～80MPa, extruding machine barrel temperature control is adjusted in the range of 140～198 DEG C；Then
It is fusion plastification in subsidiary engine, material enters the barrel of extruder, by Screw Extrusion Stress control in 40～70MPa, extruder spiral shell
Cylinder temperature control adjustable range is 180～230 DEG C；
3rd step, fused materials distribution：The fused materials of double extrusion barrel extrusions in the second step are entered in Melt Pump,
Fused materials are carried out in the Melt Pump and is allocated co-extrusion；
4th step, fused materials enter mould：The fused materials of Jing Melt Pumps distribution are entered in mould in 3rd step, mould
Tool temperature setting is 9 sections, respectively：208～230 DEG C, 198～202 DEG C, 193～197 DEG C, 188～192 DEG C, 183～187
DEG C, 188～192 DEG C, 193～197 DEG C, 198～202 DEG C with 208～230 DEG C, fused materials from mould outlet extrusion after enter
On shaping platform, high-temperature molten material is cooled and solidified on the shaping platform and form sheet material blank；
5th step, traction：The sheet material blank is entered between the rubber roll of hauling machine, sheet material blank traction is carried out；
6th step, tempering：Tempering box, the tempering box will be passed through from the sheet material blank pulled out between the hauling machine rubber roll
Temperature is 80～120 DEG C；
7th step, it is air-cooled：Sheet material blank from the tempering box out is passed through into air-cooled；
8th step, cuts：To on request cut from described air-cooled sheet material blank out.
2. the manufacture craft of PP according to claim 1 and TPU composite double layer hollow plastic sheet material co-extrusions, its feature exists
In in the second step, during the fusion plastification in main frame, extruding machine barrel temperature control is adjusted includes three sections of regulations：Melting
Fluxing zone temperature is：140～180 DEG C, equalizer section temperature is 180～195 DEG C, and metering section temperature is 190～198 DEG C；In subsidiary engine
During middle fusion plastification, extruding machine barrel temperature control is adjusted includes three sections of regulations：Fusion plastification section temperature is:180～195 DEG C,
Equalizer section temperature is 195～210 DEG C, and metering section temperature is 210～230 DEG C.
3. the manufacture craft of PP according to claim 1 and TPU composite double layer hollow plastic sheet material co-extrusions, its feature exists
In in the 4th step, fused materials are entered on shaping platform from after mould outlet extrusion, and the table top temperature of the shaping platform is
15～20 DEG C.
4. the manufacture craft of PP according to claim 1 and TPU composite double layer hollow plastic sheet material co-extrusions, its feature exists
In in the 6th step, sheet material blank is 100～140s through the time used by tempering box.
5. the manufacture craft of PP according to claim 1 and TPU composite double layer hollow plastic sheet material co-extrusions, its feature exists
In the extruder is two plastic extruder combinations, and it includes single screw rod main frame and single screw rod subsidiary engine, the single screw rod main frame
Rotating speed is 90/rpm, and the single screw rod subsidiary engine rotating speed is 150/rpm.
6. a kind of PP and TPU composite double layer hollow plastic sheet materials, it is by the PP and TPU described in claim 1-5 any one
The manufacture craft of composite double layer hollow plastic sheet material co-extrusion is prepared from, it is characterised in that upper strata TPU composite beds and lower floor TPU
It is polypropylene layer in the middle of composite bed, the upper strata TPU composite beds and lower floor TPU composite beds, between being provided with the middle of the polypropylene layer
Every hollow bulb.
7. a kind of PP according to claim 6 and TPU composite double layer hollow plastic sheet materials, it is characterised in that the TPU is answered
It is 0.4mm to close thickness degree, and the polypropylene layer thickness is 3.6mm.
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| CN201410613490.2A CN104385546B (en) | 2014-11-04 | 2014-11-04 | PP and TPU composite double-layer hollow plastic plate coextrusion manufacture technology |
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| CN105599260A (en) * | 2015-12-21 | 2016-05-25 | 都昌县业达汽车零部件有限公司 | Process for once extrusion molding to make sheath |
| CN106957482A (en) * | 2017-03-29 | 2017-07-18 | 珠海市希斯达包装材料有限公司 | A kind of hollow board material and its preparation technology |
| CN110126234A (en) * | 2018-02-09 | 2019-08-16 | 万亿运营（深圳）科技有限责任公司 | A kind of filled type plastic box body panel and its production method |
| CN114407320A (en) * | 2021-12-30 | 2022-04-29 | 宁波盒象科技有限公司 | Manufacturing method of logistics turnover box substrate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102152515A (en) * | 2010-11-20 | 2011-08-17 | 何承居 | Film-coated profile and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102152515A (en) * | 2010-11-20 | 2011-08-17 | 何承居 | Film-coated profile and manufacturing method thereof |
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